import org.bouncycastle.asn1.x509.SubjectDirectoryAttributes; //导入依赖的package包/类
private String getSubjectDirectoryAttributesStringValue(byte[] value) throws IOException {
	// @formatter:off

	/*
	 * SubjectDirectoryAttributes ::= ASN1Sequence SIZE (1..MAX) OF Attribute
	 *
	 * Attribute ::= ASN1Sequence
	 * {
	 *      type AttributeType,
	 *      values SET OF AttributeValue
	 * }
	 */

	// @formatter:on

	StringBuilder sb = new StringBuilder();

	SubjectDirectoryAttributes subjectDirectoryAttributes = SubjectDirectoryAttributes.getInstance(value);

	for (Object attribute : subjectDirectoryAttributes.getAttributes()) {

		ASN1ObjectIdentifier attributeType = ((Attribute) attribute).getAttrType();
		String attributeTypeStr = attributeType.getId();

		ASN1Encodable[] attributeValues = ((Attribute) attribute).getAttributeValues();

		for (ASN1Encodable attributeValue : attributeValues) {

			String attributeValueStr = getAttributeValueString(attributeType, attributeValue);

			sb.append(MessageFormat.format("{0}={1}", attributeTypeStr, attributeValueStr));
			sb.append(NEWLINE);
		}
	}

	return sb.toString();
}